20065057 has 4 divisors (see below), whose sum is σ = 20122900. Its totient is φ = 20007216.

The previous prime is 20065051. The next prime is 20065061. The reversal of 20065057 is 75056002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11532816 + 8532241 = 3396^2 + 2921^2 .

It is a cyclic number.

It is not a de Polignac number, because 20065057 - 2⁷ = 20064929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20065051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28398 + ... + 29095.

It is an arithmetic number, because the mean of its divisors is an integer number (5030725).

Almost surely, 2^20065057 is an apocalyptic number.

It is an amenable number.

20065057 is a deficient number, since it is larger than the sum of its proper divisors (57843).

20065057 is an equidigital number, since it uses as much as digits as its factorization.

20065057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57842.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20065057 is about 4479.4036433436. The cubic root of 20065057 is about 271.7357628871.

The spelling of 20065057 in words is "twenty million, sixty-five thousand, fifty-seven".